I for one HATE domes. Period, end of story. Football was invented playing in the elements. Nothing can cause a cancelation (save flooding/hurricanes and tornado's, yo uknow, the extremes). Grant it, it means you can host a SB, but seriously, I would rather see football played the way it was meant to be played, instead of a dome "arena" style field. I hate it. Seriously, games like the packers and seahawks in the playoffs last year is exactly why the elements are just awesome in playoff football.
As allan said, Heinz Field is natural grass. Here's the official link: http://www.steelers.com/heinzfield/stadiuminfo/
Dude you are totally right! I thought that cold ass ice bowl between dallas and greenbay was the super bowl. See what happens when I let my anger do the typing. Thanks for showing me the light.